[Scan-DC] Denver Fire Department to follow cops’ lead and encrypt radio traffic next month — though not all of it

Mon Mar 11 11:17:53 EDT 2019

I sometimes hear an unencrypted dispatcher talking to encrypted mobiles on some Fed freqs, so it can be done. 

Sent via the Samsung Galaxy S7 active, an AT&T 4G LTE smartphone
-------- Original message --------From: Joel Kahn <jrkahn at att.net> Date: 3/10/19  3:37 PM  (GMT-05:00) To: "Scott, KB3JQQ" <kb3jqq at yahoo.com>, Scan DC <scan-dc at mailman.qth.net> Subject: Re: [Scan-DC] Denver Fire Department to follow cops’ lead and encrypt radio traffic next month — though not all of it 
Scott:
I could be wrong, I usually am, but I believe that one of two things can happen when you transmit unencrypted on the same system & talk group as encrypted:
1-the unencrypted call can be heard on the encrypted radio, but the response will not be heard on the unencrypted radio.  Encryption should be controlled with an on/off toggle or selection control on each radio.or2- maybe the talk group can revert to unencrypted for the duration of the conversation.
I do know that the computer controlled talk groups on mixed FDMA/TDMA systems work between the two modes this way.
Joel R Kahn 

    On Sunday, March 10, 2019, 9:49:22 AM EDT, Scott, KB3JQQ via Scan-DC <scan-dc at mailman.qth.net> wrote:  

   "It’s difficult to switch between encrypted and unencrypted channels"

For some reason, I don't believe this statement. My local PD

has open and encrypted channels on the same system.

    On Sunday, March 10, 2019, 12:50:07 AM EST, Alan Henney <alan at henney.com> wrote:  

 https://www.denverpost.com/2019/02/27/denver-fire-radio-encryption/

Denver Fire Department to follow cops’ lead and encrypt radio traffic next
month — though not all of it

Fire radio traffic will disappear from public airwaves March 18, though
automated dispatch calls will remain

911 call taker Tiffanni Foster takes emergency calls at the Denver City and
County Communications Center on Jan. 8, 2013.
By ELISE SCHMELZER | eschmelzer at denverpost.com | The Denver Post
PUBLISHED: February 27, 2019 at 1:19 pm | UPDATED: March 6, 2019 at 10:18 am

Following the lead of Denver police, radio traffic from the Denver Fire
Department will no longer be accessible to the public starting in April,
though one automated dispatch channel will remain open.

Fire department leaders in January made the decision to encrypt their radio
traffic to make it easier to communicate with police, who decided to
encrypt their traffic as well, fire department spokesman Greg Pixley said.
Both agencies use the same radios, he said.

“What police are doing, we are following,” Pixley said.

The fire department’s radio traffic will disappear from public scanners in
late April. However, the public will still be able to listen to automated
dispatch alerts that tell firefighters where to go and the basics of what
is happening there, though communication from firefighters on scene will be
blocked, he said.

The Denver Police Department’s radio traffic is also expected to go silent
at that time. Denver police Chief Paul Pazen said last month that news
organizations would have the option to sign an agreement with the city to
gain access to the encrypted channels.

Denver police have not yet said what they’ll ask local news organizations
to agree to before being granted access to the city’s encrypted radio
traffic.

The change comes as a 911 communications center is completed and officers
and firefighters receive new radios. Pazen said the change will help keep
sensitive information from being broadcast publicly and keep suspects and
criminals from keeping tabs on police operations.

Pixley said in November that the fire department was not planning on
encrypting its channels, but he said Tuesday that the department later
learned it would need to do so to facilitate easy communication with
police. It’s difficult to switch between encrypted and unencrypted
channels, he said, and echoed Pazen’s concerns about sensitive information
being broadcast.

It was simpler to encrypt everything, Pixley said.

“We want to have some degree of control over those super-sensitive calls
that we have,” Pixley said. “We also want to limit the ability of sensitive
information to get out.”

Pixley said the agreement between news outlets and the city would also
grant access to the fire department’s communications.

Representatives from the Colorado Press Association and the Colorado
Freedom of Information Coalition have previously expressed concern about
Denver’s decision to encrypt, saying it would inhibit journalists’
abilities to report breaking news.

At least 28 other public safety agencies in the state encrypt their radio
traffic.

Story updated 10:15 a.m. March 6, 2019: Due to incorrect information given
to The Denver Post by the Denver police and fire departments, this article
has been corrected to state that fire and police channels will be encrypted
in late April.
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